Synlogic Ownership | Who Owns Synlogic?

Synlogic Ownership Summary

Synlogic is owned by 55.13% institutional investors, 11.25% insiders, and 33.62% retail investors. Nea management company is the largest institutional shareholder, holding 23.79% of SYBX shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 1.19% of its assets in Synlogic shares.

SYBX Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Synlogic	55.13%	11.25%	33.62%
Sector	Healthcare Stocks	487.91%	11.08%	-398.99%
Industry	Biotech Stocks	306.69%	11.10%	-217.79%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Nea management company	2.92M	23.79%	$3.71M
Fiduciary trust	22.35K	0.18%	$28.39K
Ikarian capital	20.42K	0.17%	$25.94K
Blackrock funding, inc. /de	19.76K	0.16%	$25.09K
Sbi securities	103.00	0.00%	$172.00
Hilltop national bank	20.00	0.00%	$33.00
Jones financial companies lllp	20.00	0.00%	$35.00
Abg innovation capital partners iii gp	-	-	-

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Nea management company	2.92M	0.28%	$3.71M
Ikarian capital	20.42K	0.01%	$25.94K
Fiduciary trust	22.35K	0.00%	$28.39K
Blackrock funding, inc. /de	19.76K	-	$25.09K
Abg innovation capital partners iii gp	-	-	-
Sbi securities	103.00	-	$172.00
Jones financial companies lllp	20.00	-	$35.00
Hilltop national bank	20.00	-	$33.00

Top Buyers

Holder	Shares	% Assets	Change
Jones financial companies lllp	20.00	-	20.00
Blackrock funding, inc. /de	19.76K	-	-
Fiduciary trust	22.35K	0.00%	-
Ikarian capital	20.42K	0.01%	-
Nea management company	2.92M	0.28%	-

Top Sellers

Holder	Shares	% Assets	Change
Abg innovation capital partners iii gp	-	-	-13.73K
Sbi securities	103.00	-	-6.00
Ikarian capital	20.42K	0.01%	-
Nea management company	2.92M	0.28%	-
Hilltop national bank	20.00	-	-

New Positions

Holder	Shares	% Assets	Change	Value
Jones financial companies lllp	20.00	-	20.00	$35.00

Sold Out

Holder	Change
Abg innovation capital partners iii gp	-13.73K

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2025	18	12.50%	6,771,874	95.25%	55	6.92%	7	75.00%	3	-
Mar 31, 2025	17	-	6,780,518	0.24%	55	1.79%	4	33.33%	3	50.00%
Dec 31, 2024	17	6.25%	6,764,147	-0.91%	55	1.78%	3	50.00%	2	-50.00%
Sep 30, 2024	16	-5.88%	6,826,002	-1.63%	55	1.73%	2	-50.00%	4	33.33%
Jun 30, 2024	17	6.25%	6,939,069	0.22%	56	1.75%	4	-33.33%	3	-25.00%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard US Total Market Shares ETF	139.45K	1.19%	-
Vanguard Total Stock Mkt Idx Inv	136.47K	1.17%	-2.98K
Fidelity VIP Growth Initial	76.83K	0.66%	-
Fidelity Capital Appreciation	61.29K	0.52%	-
Fidelity Advisor Equity Growth I	43.12K	0.37%	-
Fidelity Extended Market Index	36.92K	0.32%	-260.00
Vanguard Institutional Extnd Mkt Idx Tr	32.28K	0.28%	-10.20K
Fidelity Growth Discovery	29.26K	0.25%	-
Fidelity Advisor Series Equity Gr	10.65K	0.09%	-
Fidelity Series Total Market Index	9.54K	0.08%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
Oct 29, 2025	Dooley Mary Beth	See Remarks below	Sell	$284.17
Apr 02, 2025	Dooley Mary Beth	See Remarks below	Sell	$172.80
Feb 03, 2025	Dooley Mary Beth	See Remarks below	Sell	$2.80K
Oct 29, 2024	Dooley Mary Beth	Head of Finance	Sell	$110.60
Apr 02, 2024	Dooley Mary Beth	Head of Finance	Sell	$325.24

Insider Transactions Trends

Date	Buy	Sell
2025 Q4	-	1
2025 Q2	-	1
2025 Q1	-	1
2024 Q4	-	1
2024 Q2	-	2

SYBX Ownership FAQ

Who Owns Synlogic?

Synlogic shareholders are primarily institutional investors at 55.13%, followed by 11.25% insiders and 33.62% retail investors. The average institutional ownership in Synlogic's industry, Biotech Stocks , is 306.69%, which Synlogic falls below.

Who owns the most shares of Synlogic?

Synlogic’s largest shareholders are Nea management company (2.92M shares, 23.79%), Fiduciary trust (22.35K shares, 0.18%), and Ikarian capital (20.42K shares, 0.17%). Together, they hold 24.14% of Synlogic’s total shares outstanding.

Does Blackrock own Synlogic?

BlackRock is not among the top 10 institutional shareholders of Synlogic.

Who is Synlogic’s biggest shareholder by percentage of total assets invested?

Nea management company is Synlogic’s biggest shareholder by percentage of total assets invested, with 0.28% of its assets in 2.92M Synlogic shares, valued at 3.71M$.

Who is the top mutual fund holder of Synlogic shares?

Vanguard US Total Market Shares ETF is the top mutual fund holder of Synlogic shares, with 1.19% of its total shares outstanding invested in 139.45K Synlogic shares.

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